Challenge: Add Usernames

Cocoa Programming for OS X (5th Edition) 16. Using Notifications
1

This solution is very clumsy, but it appears to work…

dynamic var userName: String?

@IBAction func send(sender: AnyObject) {
    sender.window?.endEditingFor(nil)
    if var message = message {
        if (self.userName != nil) {
            message = (self.userName! + ": " + message)
        }
        else {
            message = ("Default User: " + message)
        }
        let userInfo = [ChatWindowControllerMessageKey : message]
        let notificationCenter = NSNotificationCenter.defaultCenter()
        notificationCenter.postNotificationName(ChatWindowControllerDidSendMessageNotification, object: self, userInfo: userInfo)
    }
    message = ""
}